The folks at Desafio are very knowledgeable and will help you plan a great visit to Costa Rica. Not only do they know well the options in Monteverde but are also well known tour operators in Arenal. Canyoneering, rafting and a host of other options as well as hotel recommendations that meet your needs.
They have helped many friends and relatives and each time to much satisfaction.
you can not go wrong with them. They also offer live chat for free to be able to talk to them in person.